12/04/2007 @ 6:00AM

In Pictures: The 20 Top-Earning Young Superstars

3. Maria Sharapova, $23 million

Born: April 19, 1987

Tennis’ “It” girl struggled with injuries in 2007, winning only one tournament and banking $1.7 million on the court. That’s down from five tourney wins and $3.8 million in prize money the previous year. Not to worry, Sharapova’s endorsement portfolio is one of the strongest in sports. This year she added Pepsi as a sponsor to an already impressive roster that includes Nike, Canon, Colgate-Palmolive and Motorola.